my fanmade backstory for Magolor is that he used to be in a magic academy in Halcandra that he's been constantly outcasted in, before he causes a dangerous magic accident which gets him hated and hunted down by the people, and this causes him to steal the Lor Starcutter and run away from Halcandra, and him stealing the Master Crown was to try and rebel against his kingdom with Estelle (However Estelle doesn't entirely agree with this and causes them to split ways)
so..what I'm trying to say is..Magolor singing Defying Gravity from Wicked?? (Specfically the movie version because I watched it in theaters and it still lives in my head rent free)